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#1
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05-31-2021, 12:16 PM
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Linear Tears of the Mouth from Hot Gases and High Pressure from a Firearm
Fractures of the orbital roofs may be associated with hemorrhage into the periorbital connective tissues. This may lead to blood dissecting around the eyelids, giving the impression of black eyes, even though there was no external blunt force impact to the face. Figure 1 shows a distinguished right-sided, periorbital hemorrhage in a young man who committed suicide by intraoral gunshot wound. Note the fractures of the right orbital roof. Fig.1 Linear tears extending laterally from the corners of the mouth. In another tribute to the tremendous force imparted by the expulsion of a projectile from a gun, notice the linear tears extending laterally from the corners of his mouth. The discharge of a weapon involves the release not only of a projectile but of hot gas under high pressure as well. If the lips are sealed around the barrel, the rapid expansion of departed gases causes the cheeks to balloon far beyond their elastic capacity. This results in the characteristic tears seen in figures 1-2. Fig.2 Linear tears extending laterally from the corners of the mouth. Figure 3 shows the intraoral gunshot wound to his palate. Although the onset of rigor mortis may stiffen the jaw muscles and make this examination difficult, it is important to visualize and document the wound. One may also sample tissues from this location for microscopic examination, allowing for the documentation of gunpowder. Fig.3 The intraoral gunshot wound to the palate. - This post is for educational purposes only and is nonprofit. Under Section 107 of the US Copyright Act of 1976; Allowance is made for "Fair Use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. OP is not a medical expert. No copyright infringement intended. This post does not encourage or glorify violence/harassment. Images might have been upscaled and enhanced. Text might have been shortened and simplified/reorganized for online view. Original case report by Dolinak D., Matshes E. - CRC Press 2002. |
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#2
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05-31-2021, 12:25 PM
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Re: Linear Tears of the Mouth from Hot Gases and High Pressure from a Firearm
You have some of the best informative and interesting posts. Thank you! |
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#3
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05-31-2021, 12:54 PM
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Re: Linear Tears of the Mouth from Hot Gases and High Pressure from a Firearm
Chamber pressures from pistol caliber cartridges can vary widely, from as low as 15,000 psi to over 40,000 psi (103 to 276 GPa), so this kind of damage to the mouth is inevitable when the round leaves the muzzle.
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